如何自动比较两个句子并替换出现在一个句子中但没有出现在另一个句子中的任何值？

import nltk

def compare_and_replace(sentence1, sentence2):
    # 分词
    tokens1 = nltk.word_tokenize(sentence1)
    tokens2 = nltk.word_tokenize(sentence2)
    
    # 去重
    unique_tokens1 = list(set(tokens1))
    unique_tokens2 = list(set(tokens2))
    
    # 比较
    diff_tokens1 = [token for token in unique_tokens1 if token not in unique_tokens2]
    diff_tokens2 = [token for token in unique_tokens2 if token not in unique_tokens1]
    
    # 替换
    new_sentence1 = sentence1
    new_sentence2 = sentence2
    
    for token in diff_tokens1:
        new_sentence2 = new_sentence2.replace(token, '')
    
    for token in diff_tokens2:
        new_sentence1 = new_sentence1.replace(token, '')
    
    return new_sentence1, new_sentence2

# 测试
sentence1 = "I like apples and bananas."
sentence2 = "I like apples and oranges."

new_sentence1, new_sentence2 = compare_and_replace(sentence1, sentence2)
print("替换后的句子1:", new_sentence1)
print("替换后的句子2:", new_sentence2)